12-32755303-C-T

Variant names:

• chr12-32755303-C-T
• rs11539445
• NM_001040436.3:c.572G>A

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM2 PP2 PP3 PP5

The NM_001040436.3(YARS2):​c.572G>A​(p.Gly191Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G191V) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: YARS2 NM_001040436.3 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 3.46
• Publications: 37 publications found

Genes affected

YARS2 (HGNC:24249): (tyrosyl-tRNA synthetase 2) This gene encodes a mitochondrial protein that catalyzes the attachment of tyrosine to tRNA(Tyr). Mutations in this gene are associated with myopathy with lactic acidosis and sideroblastic anemia type 2 (MLASA2). [provided by RefSeq, Jan 2011]

YARS2 Gene-Disease associations (from GenCC):

• myopathy, lactic acidosis, and sideroblastic anemia 2

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)
• myopathy, lactic acidosis, and sideroblastic anemia

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000286950 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 13 curated pathogenic missense variants (we use a threshold of 10). The gene has 3 curated benign missense variants. Gene score misZ: 0.26421 (below the threshold of 3.09). Trascript score misZ: 0.56393 (below the threshold of 3.09). GenCC associations: The gene is linked to myopathy, lactic acidosis, and sideroblastic anemia, myopathy, lactic acidosis, and sideroblastic anemia 2.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.815
• PP5: Variant 12-32755303-C-T is Pathogenic according to our data. Variant chr12-32755303-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 102434.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001040436.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	YARS2	NM_001040436.3	MANE Select	c.572G>A	p.Gly191Asp	missense	Exon 1 of 5	NP_001035526.1	Q9Y2Z4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	YARS2	ENST00000324868.13	TSL:1 MANE Select	c.572G>A	p.Gly191Asp	missense	Exon 1 of 5	ENSP00000320658.8	Q9Y2Z4
	YARS2	ENST00000874023.1		c.572G>A	p.Gly191Asp	missense	Exon 1 of 4	ENSP00000544082.1
	YARS2	ENST00000874022.1		c.572G>A	p.Gly191Asp	missense	Exon 1 of 4	ENSP00000544081.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Myopathy, lactic acidosis, and sideroblastic anemia 2 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.26
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.40
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Benign	0.17	T
Eigen	Uncertain	0.30
Eigen_PC	Uncertain	0.26
FATHMM_MKL	Benign	0.23	N
LIST_S2	Uncertain	0.89	D
M_CAP	Uncertain	0.089	D
MetaRNN	Pathogenic	0.81	D
MetaSVM	Benign	-0.82	T
MutationAssessor	Uncertain	2.3	M
PhyloP100		3.5
PrimateAI	Benign	0.43	T
PROVEAN	Benign	-1.2	N
REVEL	Pathogenic	0.71
Sift	Uncertain	0.020	D
Sift4G	Uncertain	0.016	D
Polyphen		0.97	D
Vest4		0.82
MutPred		0.48		Loss of methylation at R194 (P = 0.0463)
MVP		0.55
MPC		0.71
ClinPred		0.97	D
GERP RS		4.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.77
gMVP		0.41
Mutation Taster		=21/79	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs11539445; hg19: chr12-32908237;